Apparatus for automatically sealing the space between an elevato

Details Apparatus for automatically sealing the space between an elevato Apparatus for automatically sealing the space between an elevato

1991-02-22

1992-02-04

Olszewski, Robert P.

Elevator, industrial lift truck, or stationary lift for vehicle

Stationary lift for roadway vehicle or required component...

Having specific drive means for support

187 51, 49477, 277 346, B66B 900

Patent

active

050852930

ABSTRACT:
A sealing apparatus has inflatable hallow body portions extending around a car opening to close off the space between an elevator shaft wall and the car opening of an elevator car in a draftsproof and weatherproof manner when stopping at a floor. After the car stops at a floor, a pressurized fluid medium is utilized to inflate the hollow body until it is pressed against the shaft wall. The hollow body of the sealing apparatus is ventilated to atmosphere or to a vacuum before the departure of the elevator car from the floor such that the hollow body retracts so as to assure the spacing which is necessary for the free travel of the elevator car in the shaft. The sealing apparatus is monitored for low and excess pressure conditions.

REFERENCES:
patent: 3359687 (1967-12-01), Wallace
patent: 3371986 (1968-03-01), Brown
patent: 3518355 (1970-06-01), Luce
patent: 4058191 (1977-11-01), Balbo
patent: 4150509 (1979-04-01), Knap
patent: 4665653 (1987-05-01), Franz et al.
patent: 4722151 (1988-02-01), Westwell
patent: 4735293 (1988-04-01), Everhart et al.
patent: 4761917 (1988-08-01), Knecht et al.

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